Method for correcting gradation of output data, for use in a pic

Details Method for correcting gradation of output data, for use in a pic Method for correcting gradation of output data, for use in a pic

1982-09-30

1985-08-06

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

358 80, 358284, 364571, 364737, 371 30, G06K 936

Patent

active

045340595

ABSTRACT:
A method for correcting gradation of output data for reproducing a picture image, for use in a picture digital processing system wherein picture data is processed by using one or a plurality of lookup table memories aligned in series, wherein a variable number of lower bits of input data to be input to the lookup table memory, the number of the lower bits of the input data being varied depending on the input data and the input-output characteristics of the one lookup table memory or the total input-output characteristics of the plurality of lookup table memories, is added as correction data to data output by the one or the plurality of lookup table memories.

REFERENCES:
patent: 3807860 (1974-04-01), Brainard
patent: 4032765 (1977-06-01), Epstein et al.
patent: 4084239 (1978-04-01), Anastasia et al.
patent: 4356731 (1982-11-01), Mahony
patent: 4402015 (1983-08-01), Yamada
patent: 4468692 (1984-08-01), Yamada et al.

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